Dust-collecting device



Nov. 13 1923.

H. H. EATON DUST COLLECTING DEVIQE Filed May '27. 1918 2 Sheets-Sheet 1 WVZNTUQ V Nov. 13 1923.

DUST COLLECTING DEVICE EATON Filed May 27, 1918 2 Sheets-Sheet 2 Patented Nov. 13, 1923.

e UNITED STATES PATENT OFFICE.

HARRISON H. EATON, E BEVERLY, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MACHINERY CORPORATION, OF PATERSON, NEW JERSEY,

NEW JERSEY.

A CORPORATION OF DUST-COLLECTING DEVICE.

Application filed May 27, 1918; Serial 1205 236320.

To all whom it may concern: Be it known that I, HARRISON H. EATON, a citizen of the United States, residing at Beverly, in the county of Essex and State 5 of- Massachusetts, have invented certain Improvements in Dust-Collecting Devices, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures.

This invention relates to means for arresting dust formed in the operation of a machine. It is here illustrated in connection with a grinding machine;

Many machines throw off, either from the work or the operating instrumentalities, or

both, particles which when inhaled are a menace to health, which are sufiiciently hot to start fires, or which form with air explosive mixtures. In grinding machines, for example, the first two dangers arise. To preventthis ejection of dust, the present invention provides a device, effective in action, which occupies a relatively small space, as that within the frame of the machine producing the dust, and from which the collected material may be removed quickly without mingling it with the.

air ofthe room in which the associated machine is located.

To accomplish such results, I combine with a hollow casing for supporting a clustproducing member, as a grinding'wheel or other abrasive means, a porous receptacle contained within and, receiving the dust through the casing. This casing is provided with an opening through which access may be had to the receptacle, in addition to the air egress opening or openings, and, to facilitate the removal of the accumulated dust, the receptacle is preferably mounted upon the closure for this ingress opening. This closure or door is shown. as having .at its upper portion a holder for the receptacle,.and at its. lower extremity the weight of said receptacle and its contents is borne by a shelf projecting from the door. Separably, pivoting the door on the casing renders it possible to take the door and receptacle together fromthe casing for uch disposition of the contents as may be desirable. I prefer to arrange the receptacle holder to form a closure for the space between the receptacle and the interior of the casing. To prevent leakage of the dust-laden air past their juncture, while avoiding interference with the removal and replacement of the door and receptacle, the holder upon the door fills but a portion of the space, there being shown a projection from the casing occupying another portion of the space. This projection may also share in the receptaclesustaining function.

One embodiment of the invention, illustrating its application to a grinding machine, appears in the accompanying drawlngs,

Fig 1 being a front elevation of a grinding machine, in connection with which my improved device is employed Fig. 2, a perspective detail of the lower portion of the casing with the door in its open position, and

Fig. 3, a side elevation looking from the left in Fig. 1, parts being broken away.

A casing or standard for supporting the active elements of the machine and for cooperating with the dust-collecting device of the present invention includes a hollow base portionlO and an upper portion or head 12, which is also hollow. Included in the head 12 at each side are hoods 14;, 14, open at the front to receive abrasive wheels 16, 16.

These wheels are fixed to the extremities of a shaft 18 journaled in bearings near the top of the head. Between the hoods the head has formed therein compartments 20,

20 containing suction fans 22, 22 ,fast upon a shaft 24.- rotatably mounted in the head somewhat below and to the rear of the shaft 18. Both the shafts 18 and 24 are belted to a counter-shaft 26, turning upon a bracket 28 projecting from the rear of the base portion. of the casing. The fans 22 draw the air through the openings in the front of the hoods past the wheels and deliver it,

with the particles carried thereby, to a single passage 30 connecting the fan compartments with the interior of the base of the casing, the passage being of less transverse sectional area than the base. In the front of the portion 10 of the casing is an opening through which access may be had to the interior, it being here illustrated as extending for substantially the full width of th base and from the upper portion at the juncture with the passage 30 nearly to the foot of the casing. It is normally closed by a door 32 pivoted at its lower extremity upon the casing. This pivotal mounting I prefer to form as a hook which gives a depression into which the wall of the casing at the lower end of the opening extends. The hook overlies the outer wall and has an inner :t'ace 36 contacting with said wall when the door is opened, as shown in dotted lines in Fig. 2 ot the drawings, thus furnishing a stop which limits the angular move ment and holdsthe door in position. lVhen closed, the door may be held in contact with the casing by a latch 38, the handle of which also serves to swing the door upon its pivotal support. At the upper portion of the inner face of the door 32- is a holder 4:0, which I 11 re here shown as furnished by separated projections the outer edges of which are parallel and operate in close proximity to the inner side walls of the base, while between the projections is a semi-c' cular depression along the upper edge of which is a recess 4:2. This recess is adapted to receive the edge surrounding the opening of a dust-collecting receptacle 44, preferably consisting of a bag of porou material of such density as to permit the free passage of the air while retaining the dust. Made into the top of the bag is a ring 46, which may be seated in the recess and there held to position the bag upon the door by a spring catch es riveted upon the edge of the latter. -When the door is closed, the holder 40 preterably extends a portion of the way across the casing, it being, in the present instance, shown as reaching but about half the distance to the rear wall. Alined with the section &0 of the holder in the closed posi tion of the door, it being conveniently formed integrally with the casing, is another holder section d9 formed similarly to the section 40 but not necessarily having the recess -12, its upper surface being at the same level as the bottom of said recess. The ends of the projections of the two sections, between which are the semi-circular depressions surrounding the mouth of the bag, are shown as in contact when the door is closed. The bag is sufiiciently long to extend substantially the full length of the door, and at its lower extremity rests upon a shelf- 50 in the form of a tray having a raised marginal flange 52. This tray sustains the weight of the bag and its contents, obviating the tendency to displace the ring 46 from the recess 42. The raised margin of the tray posit-ions the bag and prevents its lateral movement. In the rear wall of the casing are egress openings 5e for the air, these preferably having an aggregate area at least as great as that of the crosssectional area of the passage 80.

The dust-collecting bag being in place upon the door and said door closed, the fans 22 draw the particles of dislodged abrasive material and metal from the work into the base of the casing. When the air current enters the enlarged base from the passage 30, the decrease in velocity facilitates the precipitation of the particles to the bottom of the bag, with less tendency for them to be carried against the rear wall as the air passes out through the openings 5 L. When such an amount of material has collected within the bag that it is desired to remove it, the door is swung'to the position shown in Fig. 2, at which time the bag may be lifted from the front section 40 of the holder by releasing the catch L8, or the door and bag may be lifted from the casing together, rendering the bag more accessible for removal. The bag and its contents may then be taken from the work roonrand emptied. When returned to the holder, the door. is closed and the ring 46, when carried over the holder section 4:9, rests thereon. The mouth of the bag wit-h the two holder sections thus completes the closure of the casing, so that all the dust-laden air current must pass through the bag on the way to the openings 54:.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a machine of the class described, a hollow supporting standard, an abrading member mounted on the standard for 0perative movement, said standard being provided with an opening having aremovable closure and a porous receptacle contained in the standard to which the dust caused by the action of the abradingmemher on the work is delivered through the standard from the abrading member, said receptacle being operatively connected to said closure in such a fashion that the removal of the closure will remove the porous receptacle in a manner calculated to pre vent spilling the contents of said receptacle.

2. In a device of the classdescribed, an

abrasivemember, a hollow supporting casing provided with a passage and in which the abrasive member is mounted, a removable porous receptacle situated in the casing and having an opening to which the passage delivers, said casing having an opening for the removal of said receptacle and a removable closure for said opening provided with a shelf arranged to support said receptacle when the closure is in either attached or detached position.

8. In a device of the class described, an upright hollow standard having a substantially straight passage extending from end to end thereof, an abrasive member carried by the upper end of the standard, means for drawing air from the abrasive member through the passage into the base of the standard, a dust collecting receptacle supported inside the base and having an opening toreceive the'dust laden air from the abrasive member, a supporting member for the receptacle removably connectedto the Standard, said supporting member and said receptacle constituting a unit which maybe readily removed and replaced. r

4c. In a grinding machine, a hollow standardgcomprising, an 'apertured base Land a communicating head, a grinding member and a fan mounted within the head, said fan being arranged to set up an air current past the grinding member into the head, a porous dust receptacle secured inside the base and arranged as a barrier in the path of saidcurrent, said base being of larger cross section than the connecting portion of the head to decrease the velocity of the dust in the receptacle.

5. In a device of the class described, a hollow casing, an abrasive member mounted thereon, means for drawing air from the abrasive member through the casing, a porous bag suspended in the casing with an opening to receive the air from the abrasive member, said casing having an opening for the removal of the porous bag, and a completely removable closure for said opening provided with means for detachably supporting said bag.

6. In a device of the class described, a hollow standard comprising a. base and a communicating head portion, a; grinding wheel carried by the head portion and arranged to deliver the abrasive dust into the base, said base being provided with an opening, a closure for the opening, and a dust-collecting receptacle mounted on the closure and movable therewith.

7. In a device of the class described, a hollow support for an operating member, said support being provided with an ingressopening and having air egress openings in its side, a closure for the ingress opening, and a porous receptacle mounted on said closure and extending over the side egress openings.

8. In a device of the class described, a hollow support for an operating member, said support being provided with an opening, a closure for the opening having pivotal engagement near its lower extremity with the support, and a dust-collecting receptacle connected to the closure near its upper extremity and movable with said closure.

9. In a device of the class described, a hollow support for an operating member, said support being provided with an open ing, a closure for the opening having separable pivotal engagement near its lower extremity with the support and being provided with a shelf, and a dust-collecting receptacle resting on the shelf and being.

detachably donnected to the closure and movable therewith.

"10. In :a device of the clam described, a support for an operating member, said support being provided with a passage and with an opening in its wall, a closure for the opening having a holder, and a receptacle provided with an opening and being mountedon the holder and movable'ltherewith, the holder closing a portion of the passage about the opening of 'the recept-acle, there being a projection from the supportclosing another portion of the passage about the receptacle opening.

11. In a device of the class described, a hollow support for an operating member, said support being provided with an ingress opening and air egress openings, a closure for the ingress opening having a holder, a porous receptacle depending from the holder over the egress openings, and means for separably securing the receptacle to the holder.

12. In a device of the class described, a hollow support for an operating member, said support being provided with an opening, a closure :tor'the opening, and a dustcollecting receptacle supported by the closure near its opposite extremities.

13. In a device of the class described, a hollow support for an operating member, said support being provided with an opening, a closure for the opening provided with a holder and a shelf, and a dust-collecting receptacle depending from the holder and resting on the shelf.

14. In a grinding machine, a casing including a head and a hollow base, the base having an opening, a grinding wheel mounted on the head, a door for the opening, and a porous bag carried by the door and movable therewith.

15. In a grinding machine, a casing including a head and a hollow base. the base having an opening, a grinding wheel mounted on the head, a door for the opening separable from the casing, and a porous bag giounted at its opposite extremities on the oor.

16. In a grinding machine, a casing including a head and a hollow base, the base having an opening, a grinding wheel mounted on the head, a door for the opening provided with a hook near its lower extremity for engaging the edge of the casing, and a. porous bag attached to the door and movable therewith.

17. In a grinding machine, a casing including a head and a hollow base, the base having an opening, a grinding wheel mounted on the head, a door for the opening provided near its upper extremity with a holder, and 125 a porous bag depending from the holder, there being a projection from the casing for contact with the bag opposite the holder.

18. In a grinding machine, a casing in cluding a head and a hollow base, the base having an opening, a grinding wheel mounted on the head, a door for the opening provided near its upper extremity with a holder section, a .porous bag depending from said holder section, and a co-operating holder sectioncarried by the casing.

19. In a grinding machine, a casing including a head and a hollow base, the base having an opening, a grinding wheel mounted on the head, a door for the opening provided near its vupper extremity with a holder, a porous bag depending from the holder, and a catch mounted on the door near the holder for engagement with the bag.

20. In a grinding machine, a casing including a head and a hollow base, the base having an opening, a grinding wheel mounted on the head, a door for the opening separable from the casing and being provided with a holder and a shelf, and a porous bag depending from the holder and resting on the shelf.

21, In a device of the class described, a hollow supporting standard, an abrading member mounted on the standard, said stand-- ard being provided with air egress open-' ings and a porous receptacle secured on'the inside of the hollow standard between the abrading member and the air egress openlngs.

.In testimony whereof I have signed my name to this specification.

HARRISON H. EATON. 

